CN105086965B - Oil base drilling fluid and its preparation method and application for high-temperature stratum - Google Patents
Oil base drilling fluid and its preparation method and application for high-temperature stratum Download PDFInfo
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Abstract
The oil base drilling fluid and its preparation method and application that the present invention relates to a kind of for high-temperature stratum, mainly solve the problems, such as existing high-temperature stratum low pressure and sensitive reservoir drilling process present in leakage, cave-in, bit freezing.The present invention includes following components: (1) 90 parts of base oil by using the oil base drilling fluid for high-temperature stratum based on parts by weight；(2) 1~8 parts of foaming agent；(3) 1~8 parts of foam stabilizer；Wherein, the general molecular formula of foaming agent are as follows: R1‑O‑(C3H6O)z‑R2, wherein R1And R2It is independently chosen from C1‑C20Fat-based, any one in aryl, z=20-100；Foam stabilizer is the technical solution of oil-soluble fluorine or/and silicon surface active agent; it realizes the low-density of high temperatures, inhibit shale hydration expansion and good reservoir protection effect; it preferably solves the problems, such as this, can be applied to high-temperature low-pressure strata drilling operation.
Description
Technical field
The oil base drilling fluid and its preparation method and application that the present invention relates to a kind of for high-temperature stratum.
Background technique
Currently, being directed to the condition of Different Strata, different types of drilling fluid is developed.Wherein, foam drilling fluid is due to bubble
Foam density is small, has stronger removing and cutting carring ability, and rate of penetration, effectively control can be improved applied to drilling process
Formation leakage reduces differential sticking number, reduces drill bit consumption and the advantages such as required power, probing for low pressure reservoir and opens
Hair, is optimal drilling fluid.But current conventional foam drilling fluid such as patent CN200410021014.8,
CN200410013232.7, CN200710113558.0,201210310014.4 and CN201010565685.6 etc. be all with
Water phase reduces density by mixing with air, nitrogen, natural gas or exhaust gas by the effect of foaming agent as continuous media
The foam or microvesicle of formation, due to base fluid density height, the reduction degree of system density is limited by objective condition, especially one
A little low pressure deep-wells area, drilling fluid stability be easy to cause mud by large effect, and in the strong low pressure reservoir of water sensitivity
Shale Hydration expansion, limits the application of the technology.
Oil-based foam drilling technology is emerging drilling technology, can be on ultralow pressure, high temperature, deep-well and the strong stratum of water sensitivity
Using.Develop oil-based foam drilling well, can effectively solve that conventional water base foam drilling well encounters since Mud Shale Hydration is drawn
The challenges such as leakage, cave-in, the bit freezing of hair, are of great significance to reservoir protection, are a kind of very promising drilling wells
Method.However the thermal stability of oil-based foam is the main bugbear that the current drilling fluid system faces.
Patent AU2006202080A1 discloses a kind of oil-based foam drilling fluid system of low-density, but shape in the document
At half foam life period there was only 10 minutes, it is difficult to meet the needs of drilling technology.Patent CN201210150219.0 is also disclosed
A kind of low-density oil base drilling well system, but since foaming agent used is sorbitan fatty acid ester, there is the office using temperature
It is sex-limited, therefore it is difficult to meet the needs of high-temperature drilling technique.
Summary of the invention
The first technical problem to be solved by the present invention is existed in existing high-temperature low-pressure and sensitive reservoir drilling process
The challenges such as leakage, cave-in, bit freezing, a kind of new fire resistant low-density oil base drilling fluid is provided.Drilling fluid tool
There is the advantages of low high temperature resistant, density, the expansion of inhibition hydration of mud stone and good reservoir protection effect, it is low to can be applied to high temperature
Press strata drilling operation.
The oil for high-temperature stratum of the second technical problem to be solved by the present invention one of to solve above-mentioned technical problem
The preparation method of base drilling fluid.
The oil for high-temperature stratum of the third technical problem to be solved by the present invention one of to solve above-mentioned technical problem
Application of the base drilling fluid in oil drilling.
One of to solve above-mentioned technical problem, The technical solution adopted by the invention is as follows: the oil base for high-temperature stratum bores
Well liquid includes following components based on parts by weight:
(1) 90 part of base oil；
(2) 1~8 parts of foaming agent；
(3) 1~8 parts of foam stabilizer；
Wherein, the general molecular formula of foaming agent are as follows: R1-O-(C3H6O)z-R2, wherein R1And R2It is independently chosen from C1-C20Rouge
Any one in fat base, aryl, z=20-100；Foam stabilizer is oil-soluble fluorine or/and silicon surface active agent.
In above-mentioned technical proposal, the foam stabilizer is preferably molecule by following formula (1) and (2) two kinds of structural unit structures
At:
Wherein, R3And R4Independently it preferably is selected from H or C1-C4Alkyl, more preferably H or methyl；R' is preferably selected from C1-C20
F replace fat-based or aromatic radical, more preferably from C8-C18F replace saturated fat base or aromatic radical, further preferably
C8-C18F replace saturated fat alkyl or aryl radical, be still more preferably C8-C18The alkyl that replaces of F, F and H's
Ratio is preferably 0≤a/ (a+b) < 1, more preferable 0≤a/ (a+b)≤0.8, further preferred 0≤a/ (a+b)≤0.5, a R'
The atom number of middle H, b are the atom number of F in R'；R'' preferably is selected from C1-C40Fat-based or aromatic radical, more preferably C10-
C18Saturated fat base or aromatic radical, further preferably C10-C18Saturated fat alkyl or aryl radical, further it is excellent
It is selected as C10-C18Alkyl.
In above-mentioned technical proposal, the base oil is preferably hydrocarbon or/and ester, such as can be petroleum oil commonly used in the art
Or or mixtures thereof its fraction, vegetable oil, organic liquid of various synthesis, further preferred scheme are mineral oil and/or diesel oil；
More preferably at least one of 0# diesel oil, 3# white oil, 5# white oil, 7# white oil, atoleine.
In above-mentioned technical proposal, the R1It preferably is selected from C8-C16Fat-based, any one in aryl, more preferably
C8-C16Aliphatic group, further preferably C8-C16Saturated fat base, be still more preferably C8-C16Alkyl；R2It is excellent
Selected from C1-C16Fat-based, any one in aryl, more preferably C1-C16Aliphatic group, further preferably C1-C16
Saturated fat alkyl, be still more preferably C1-C16Alkyl；It is preferred that z=30-60.
In above-mentioned technical proposal, the oil base drilling fluid preferably adds 0-10 parts of tackifier, more preferably 0-2 parts, increases
Stick does not have particular/special requirement, and the tackifier well-known to those skilled in the art that can be used for oil base drilling fluid may be incorporated for this hair
It is bright, for example, oil-soluble high-molecular compound, such as common butadiene rubber, EP rubbers, the molecule of butadiene rubber, EP rubbers
Amount is preferably number-average molecular weight 1~10,000,000, more preferably number-average molecular weight 1~1,000,000.
To solve above-mentioned technical problem two, The technical solution adopted by the invention is as follows: the oil base for high-temperature stratum bores
The preparation method of well liquid, comprising the following steps:
(1) by R1- OH and propylene oxide are added in reaction kettle, in the presence of propoxylated Catalyst, reaction temperature
It is 30-150 DEG C, reacts 2-20 hours, R is then added2- Cl, the reaction was continued 3-15 hours, is led to after reaction through processing
Formula is R1-O-(C3H6O)z-R2Foaming agent；
(2) by monomer C2H2R3COOR' and C2H2R4COOR'' is added in reaction kettle, to account for the total matter of above two monomer
The oil-soluble initiator of 0.1%-2% is added in meter, and reaction temperature is 50-120 DEG C, reacts 3-12 hours, passes through after reaction
Processing obtains the foam stabilizer being made of the molecular structure unit；
(3) the component number is pressed, foam stabilizer synthesized in foaming agent synthesized in base oil, (1), (2) is mixed
Uniformly, the oil base drilling fluid is made.
In above-mentioned technical proposal, the propoxylated Catalyst can be catalysis well-known to those skilled in the art
Agent, such as basic catalyst, preferably potassium hydroxide；Oil-soluble initiator can be macromolecule well-known to those skilled in the art
Any oil-soluble initiator of the field to free radical polymerization, at least one of preferably AIBN, benzoyl peroxide.
To solve above-mentioned technical problem three, The technical solution adopted by the invention is as follows: the oil base for high-temperature stratum bores
Application of the well liquid in oil drilling.
In above-mentioned technical proposal, the high-temperature stratum temperature is preferably 80-200 DEG C.
In above-mentioned technical proposal, before application of the oil base drilling fluid in oil drilling for high-temperature stratum, it can use
Technological means well known to those skilled in the art, such as shearing forms foam in air.
In above-mentioned technical proposal, in the oil base drilling fluid for high-temperature stratum, those skilled in the art can also be added
Other auxiliary agents known to member, such as fluid loss additive.
Fire resistant low-density oil base drilling fluid of the invention is used as base fluid by using oil, has very strong inhibition, answers
For oil layer protection significant effect in high-temperature low-pressure and sensitive reservoir drilling process；Foaming agent and the foam stabilizer composition of selection
Foam system can reduce oil/air surface tension, be conducive to the generation of oil-based foam, fundamentally reduce drilling fluid density,
This foaming system has good heat-resisting quantity simultaneously, strong in the foam stability that high-temperature stratum generates.
Using technical solution of the present invention, oil base drilling fluid system is controllable to form density 0.5g/cm3~0.9g/cm3's
Oil-based foam, half-life period 30 minutes or more, and still can control after high temperature ageing 8 hours and form density 0.5g/cm3~
0.9g/cm3Oil-based foam, half-life period 30 minutes or more, achieve preferable technical effect.
Specific embodiment
[comparative example 1]
90 parts of white oils, 2 parts of sorbitan fatty acid esters, flourine-containing acrylate ester synthesized in 2 parts of embodiments 1 are taken, is stirred
It mixes uniformly, obtains oil base drilling fluid, obtained oil base drilling fluid is sheared 60 minutes in air, measure system foaming
200mL, density 0.68g/cm3, half foam life period 32 minutes, 150 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 130mL, density 0.86g/cm3, half foam life period 15 minutes.
[embodiment 1]
(1) by 5 grams of C8H17- OH and 67 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 100 DEG C, reacts 6 hours, 6 grams of C is then added8H17- Cl, the reaction was continued 3 hours, obtains C through processing after reaction8H17O
(C3H6O)30C8H17；
(2) by 10 grams of C2H3COOC8H5F12With 50 grams of C2H3COOC10H21It is added in reaction kettle, n-hexane is then added,
0.66 gram of AIBN is added, reaction temperature is 50 DEG C, reacts 5 hours, obtains after reaction through processing by the molecular structure list
The foam stabilizer that member is constituted；
(3) 90 parts of white oils, foam stabilizer synthesized in foaming agent synthesized in 2 parts (1) and 2 parts (2) are taken, stirring is equal
It is even, obtain the oil base drilling fluid for high-temperature stratum.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
220mL, density 0.66g/cm3, half foam life period 38 minutes, 150 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 210mL, density 0.66g/cm3, half foam life period 38 minutes.
[embodiment 2]
(1) by 5 grams of C12H25- OH and 55 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 90 DEG C, reacts 7 hours, 4.7 grams of C is then added10H21- Cl, the reaction was continued 4 hours, obtains C through processing after reaction12H25O
(C3H6O)35C10H21；
(2) by 10 grams of C2H3COOC10H7F14With 38 grams of C3H5COOC12H25It is added in reaction kettle, n-hexane is then added,
0.1 gram of AIBN is added, reaction temperature is 60 DEG C, reacts 6 hours, obtains after reaction through processing by the molecular structure unit
The foam stabilizer of composition；
(3) 90 parts of white oils, foam stabilizer synthesized in foaming agent synthesized in 3 parts (1) and 2 parts (2) are taken, stir 60 points
Then clock is added the butadiene rubber that 2 number average molecular weights are 200,000, stirs evenly, obtain the oil base drilling well for high-temperature stratum
Liquid.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
220mL, density 0.66g/cm3, half foam life period 39 minutes, 100 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 215mL, density 0.66g/cm3, half foam life period 39 minutes.
[embodiment 3]
(1) by 5 grams of C14H27- OH and 55 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 110 DEG C, reacts 8 hours, 2 grams of C is then added3H7- Cl, the reaction was continued 6 hours, obtains C through processing after reaction14H27O
(C3H6O)40C3H7；
(2) by 10 grams of C3H5COOC12H9F16With 25 grams of C2H3COOC14H29It is added in reaction kettle, n-hexane is then added,
0.45 gram of AIBN is added, reaction temperature is 65 DEG C, reacts 7 hours, obtains after reaction through processing by the molecular structure
The foam stabilizer that unit is constituted；
(3) 90 parts of white oils, foam stabilizer synthesized in foaming agent synthesized in 4 parts (1) and 3 parts (2) are taken, stir 60 points
Then clock is added the EP rubbers that 2 number average molecular weights are 300,000, stirs evenly, obtain the oil base drilling well for high-temperature stratum
Liquid.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
230mL, density 0.63g/cm3, half foam life period 41 minutes, 150 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 225mL, density 0.63g/cm3, half foam life period 41 minutes.
[embodiment 4]
(1) by 5 grams of C16H25- OH and 56 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 120 DEG C, reacts 8 hours, 5.5 grams of C is then added16H31- Cl, the reaction was continued 5 hours, obtains C through processing after reaction16H25O
(C3H6O)45C16H31；
(2) by 10 grams of C3H5COOC14H9F20With 18.5 grams of C3H5COOC15H31It is added in reaction kettle, toluene is then added,
0.1 gram of benzoyl peroxide is added, reaction temperature is 85 DEG C, reacts 4 hours, obtains after reaction through processing by the molecule
The foam stabilizer that structural unit is constituted；
(3) 90 parts of white oils, foam stabilizer synthesized in foaming agent synthesized in 4 parts (1) and 5 parts (2) are taken, stirring is equal
It is even, obtain the oil base drilling fluid for high-temperature stratum.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
250mL, density 0.59g/cm3, half foam life period 43 minutes, 180 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 240mL, density 0.60g/cm3, half foam life period 42 minutes.
[embodiment 5]
(1) by 5 grams of C14H27- OH and 68 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 80 DEG C, reacts 12 hours, 4 grams of C is then added10H15- Cl, the reaction was continued 6 hours, obtains C through processing after reaction14H27O
(C3H6O)50C10H15；
(2) by 10 grams of C3H5COOC16H9F24With 8.4 grams of C3H5COOC16H33It is added in reaction kettle, toluene is then added,
0.09 gram of AIBN is added, reaction temperature is 85 DEG C, reacts 8 hours, obtains after reaction through processing by the molecular structure list
The foam stabilizer that member is constituted；
(3) 90 parts of diesel oil, foam stabilizer synthesized in foaming agent synthesized in 6 parts (1) and 8 parts (2) are taken, stirring is equal
It is even, obtain the oil base drilling fluid for high-temperature stratum.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
260mL, density 0.57g/cm3, half foam life period 44 minutes, 200 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 250mL, density 0.59g/cm3, half foam life period 42 minutes.
[embodiment 6]
(1) by 5 grams of C10H13- OH and 106 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 140 DEG C, reacts 7 hours, 5 grams of C is then added8H15- Cl, the reaction was continued 4 hours, obtains C through processing after reaction10H13O
(C3H6O)55C8H15；
(2) by 10 grams of C2H3COOC18H11F26With 13 grams of C3H5COOC18H37It is added in reaction kettle, toluene is then added, add
Enter 0.35 gram of AIBN, reaction temperature is 90 DEG C, reacts 4 hours, obtains after reaction through processing by the molecular structure unit
The foam stabilizer of composition；
(3) 90 parts of diesel oil, foam stabilizer synthesized in foaming agent synthesized in 5 parts (1) and 6 parts (2) are taken, stir 60 points
Then clock is added the EP rubbers that 2 number average molecular weights are 500,000, stirs evenly, obtain the oil base drilling well for high-temperature stratum
Liquid.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
270mL, density 0.55g/cm3, half foam life period 46 minutes, 100 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 270mL, density 0.55g/cm3, half foam life period 46 minutes.
[embodiment 7]
(1) by 5 grams of C16H31- OH and 73 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 120 DEG C, reacts 4 hours, 4.3 grams of C is then added12H25- Cl, the reaction was continued 6 hours, obtains C through processing after reaction16H31O
(C3H6O)60C12H25；
(2) by 10 grams of C3H5COOC16H5F28With 11 grams of C2H3COOC17H35It is added in reaction kettle, toluene is then added, add
Enter 0.1 gram of benzoyl peroxide, reaction temperature is 105 DEG C, reacts 8 hours, obtains after reaction through processing by the molecule
The foam stabilizer that structural unit is constituted；
(3) 90 parts of diesel oil, foam stabilizer synthesized in foaming agent synthesized in 4 parts (1) and 5 parts (2) are taken, stir 60 points
Then clock is added the butadiene rubber that 2 number average molecular weights are 600,000, stirs evenly, obtain the oil base drilling well for high-temperature stratum
Liquid.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
260mL, density 0.57g/cm3, half foam life period 46 minutes, 120 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 255mL, density 0.57g/cm3, half foam life period 46 minutes.
[embodiment 8]
(1) by 5 grams of C16H31- OH and 65 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 110 DEG C, reacts 5 hours, 3.6 grams of C is then added10H19- Cl, the reaction was continued 9 hours, obtains C through processing after reaction16H31O
(C3H6O)54C10H19；
(2) by 10 grams of C3H5COOC18H7F30With 5.5 grams of C2H3COOC12H25Be added in reaction kettle, be then added just oneself
0.1 gram of AIBN is added in alkane, and reaction temperature is 60 DEG C, reacts 12 hours, obtains after reaction through processing by the molecular structure
The foam stabilizer that unit is constituted；
(3) 90 parts of atoleines, foam stabilizer synthesized in foaming agent synthesized in 3 parts (1) and 4 parts (2), stirring are taken
Uniformly, the oil base drilling fluid for high-temperature stratum is obtained.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
250mL, density 0.58g/cm3, half foam life period 42 minutes, 120 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 245mL, density 0.58g/cm3, half foam life period 42 minutes.
[embodiment 9]
(1) by 5 grams of C12H17- OH and 72 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 100 DEG C, reacts 5 hours, 6.5 grams of C is then added14H29- Cl, the reaction was continued 9 hours, obtains C through processing after reaction12H17O
(C3H6O)44C14H29；
(2) by 10 grams of C2H3COOC10H9F10With 6 grams of C3H5COOC11H21It is added in reaction kettle, toluene is then added, add
Enter 0.13 gram of AIBN, reaction temperature is 70 DEG C, reacts 10 hours, obtains after reaction through processing by the molecular structure unit
The foam stabilizer of composition；
(3) 90 parts of atoleines, foam stabilizer synthesized in foaming agent synthesized in 2 parts (1) and 4 parts (2), stirring are taken
60 minutes, the EP rubbers that 1 number average molecular weight is 100,000 is then added, stirs evenly, obtains the oil base for high-temperature stratum
Drilling fluid.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
260mL, density 0.57g/cm3, half foam life period 43 minutes, 130 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 255mL, density 0.57g/cm3, half foam life period 42 minutes.
[embodiment 10]
(1) by 5 grams of C14H21- OH and 54 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 70 DEG C, reacts 9 hours, 4.3 grams of C is then added10H19- Cl, the reaction was continued 4 hours, obtains C through processing after reaction14H21O
(C3H6O)38C10H19；
(2) by 10 grams of C3H5COOC12H8F17With 3.5 grams of C3H5COOC8H17It is added in reaction kettle, n-hexane is then added,
0.12 gram of AIBN is added, reaction temperature is 50 DEG C, reacts 12 hours, obtains after reaction through processing by the molecular structure list
The foam stabilizer that member is constituted；
(3) 90 parts of atoleines, foam stabilizer synthesized in foaming agent synthesized in 3 parts (1) and 3 parts (2), stirring are taken
60 minutes, the EP rubbers that 1 number average molecular weight is 800,000 is then added, stirs evenly, obtains the oil base for high-temperature stratum
Drilling fluid.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
240mL, density 0.61g/cm3, half foam life period 42 minutes, 160 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 235mL, density 0.61g/cm3, half foam life period 42 minutes.
[embodiment 11]
(1) by 5 grams of C10H19- OH and 65 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 70 DEG C, reacts 8 hours, 8.2 grams of C is then added16H29- Cl, the reaction was continued 5 hours, obtains C through processing after reaction10H19O
(C3H6O)35C16H29；
(2) by 10 grams of C3H5COOC8H2F15With 12.6 grams of C2H3COOC16H33It is added in reaction kettle, toluene is then added,
0.4 gram of AIBN is added, reaction temperature is 80 DEG C, reacts 6 hours, obtains after reaction through processing by the molecular structure unit
The foam stabilizer of composition；
(3) 90 parts of atoleines, foam stabilizer synthesized in foaming agent synthesized in 4 parts (1) and 3 parts (2), stirring are taken
60 minutes, the butadiene rubber that 2 number average molecular weights are 500,000 is then added, stirs evenly, obtains the oil base for high-temperature stratum
Drilling fluid.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
240mL, density 0.61g/cm3, half foam life period 41 minutes, 180 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 230mL, density 0.62g/cm3, half foam life period 40 minutes.
[embodiment 12]
(1) by 5 grams of C2H5- OH and 126 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH, reaction temperature 90 is added
DEG C, it reacts 4 hours, 8.3 grams of C is then added3H5- Cl, the reaction was continued 8 hours, obtains C through processing after reaction2H5O
(C3H6O)20C3H5；
(2) by 10 grams of C4H9COOC6H3F8With 4.8 grams of C4H9COOC4H7It is added in reaction kettle, toluene is then added, be added
0.22 gram of AIBN, reaction temperature are 70 DEG C, react 9 hours, obtain after reaction through processing by the molecular structure unit structure
At foam stabilizer；
(3) 90 parts of white oils, foam stabilizer synthesized in foaming agent synthesized in 2 parts (1) and 2 parts (2) are taken, stirring is equal
It is even, obtain the oil base drilling fluid for high-temperature stratum.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
150mL, density 0.81g/cm3, half foam life period 32 minutes, 80 DEG C were stirred 60 minutes after aging 8 hours, measured system foaming
145mL, density 0.81g/cm3, half foam life period 32 minutes.
[embodiment 13]
(1) by 5 grams of C4H7- OH and 100 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH, reaction temperature 80 is added
DEG C, it reacts 5 hours, 7.8 grams of C is then added6H5- Cl, the reaction was continued 5 hours, obtains C through processing after reaction4H7O
(C3H6O)25C6H5；
(2) by 10 grams of C6H11COOC4H3F6With 7.7 grams of C5H9COOC8H15It is added in reaction kettle and n-hexane is then added, add
Enter 0.1 gram of AIBN, reaction temperature is 60 DEG C, reacts 7 hours, obtains after reaction through processing by the molecular structure unit structure
At foam stabilizer；
(3) 90 parts of atoleines, foam stabilizer synthesized in foaming agent synthesized in 3 parts (1) and 2 parts (2), stirring are taken
60 minutes, the butadiene rubber that 2 number average molecular weights are 200,000 is then added, stirs evenly, obtains the oil base for high-temperature stratum
Drilling fluid.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
190mL, density 0.74g/cm3, half foam life period 33 minutes, 100 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 185mL, density 0.74g/cm3, half foam life period 33 minutes.
[embodiment 14]
(1) by 5 grams of C18H19- OH and 80 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 110 DEG C, reacts 7 hours, 6.2 grams of C is then added20H39- Cl, the reaction was continued 8 hours, obtains C through processing after reaction18H19O
(C3H6O)70C20H39；
(2) by 10 grams of C5H9COOCF3With 7 grams of C4H7COOC2H3It is added in reaction kettle, toluene is then added, be added 0.09
Gram AIBN, reaction temperature are 90 DEG C, react 4 hours, are handled obtain being made of the molecular structure unit after reaction
Foam stabilizer；
(3) 90 parts of atoleines, foam stabilizer synthesized in foaming agent synthesized in 2 parts (1) and 1 part (2), stirring are taken
60 minutes, the EP rubbers that 2 number average molecular weights are 900,000 is then added, stirs evenly, obtains the oil base for high-temperature stratum
Drilling fluid.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
170mL, density 0.77g/cm3, half foam life period 31 minutes, 120 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 165mL, density 0.77g/cm3, half foam life period 30 minutes.
[embodiment 15]
(1) by 5 grams of C20H19- OH and 95 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 80 DEG C, reacts 5 hours, 1 gram of CH is then added3- Cl, the reaction was continued 5 hours, obtains C through processing after reaction20H19O
(C3H6O)90CH3；
(2) by 10 grams of C4H7COOC20H4F35With 4 grams of C6H11COOC20H41It is added in reaction kettle, toluene is then added, add
Enter 0.11 gram of AIBN, reaction temperature is 80 DEG C, reacts 9 hours, obtains after reaction through processing by the molecular structure unit
The foam stabilizer of composition；
(3) 90 parts of white oils, foam stabilizer synthesized in foaming agent synthesized in 3 parts (1) and 3 parts (2) are taken, stirring is equal
It is even, obtain the oil base drilling fluid for high-temperature stratum.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
180mL, density 0.76g/cm3, half foam life period 33 minutes, 160 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 170mL, density 0.77g/cm3, half foam life period 31 minutes.
[embodiment 16]
(1) by 5 grams of C6H11- OH and 116 gram of propylene oxide is added in reaction kettle, and 0.5 gram of KOH is added, and reaction temperature is
It 150 DEG C, reacts 18 hours, 14 grams of C is then added18H37- Cl, the reaction was continued 8 hours, obtains C through processing after reaction6H11O
(C3H6O)100C18H37；
(2) by 10 grams of C5H9COOC6H7F4With 5.3 grams of C4H9COOC3H5It is added in reaction kettle, n-hexane is then added, add
Enter 0.08 gram of AIBN, reaction temperature is 60 DEG C, reacts 4 hours, obtains after reaction through processing by the molecular structure unit
The foam stabilizer of composition；
(3) 90 parts of diesel oil, foam stabilizer synthesized in foaming agent synthesized in 3 parts (1) and 2 parts (2) are taken, stir 60 points
Then clock is added the butadiene rubber that 2 number average molecular weights are 300,000, stirs evenly, obtain the oil base drilling well for high-temperature stratum
Liquid.
(4) the obtained oil base drilling fluid for being used for high-temperature stratum is sheared 60 minutes in air, measures system foaming
160mL, density 0.79g/cm3, half foam life period 31 minutes, 180 DEG C were stirred 60 minutes after aging 8 hours, measured system hair
Steep 150mL, density 0.80g/cm3, half foam life period 30 minutes.
Table 1
Continued 1
Claims (6)
1. a kind of oil base drilling fluid includes following components based on parts by weight:
(1) 90 part of base oil；
(2) 1~8 parts of foaming agent；
(3) 1~8 parts of foam stabilizer；
The oil base drilling fluid further includes 0~10 part of tackifier；
Wherein, the general molecular formula of foaming agent are as follows: R1-O-(C3H6O)z-R2, wherein R1Selected from C8-C16Fat-based, in aryl
Any one；R2For C1-C16Aliphatic group；Z=30-60；Foam stabilizer is oil-soluble fluorine or/and silicon surface active agent；
The foam stabilizing agent molecule is made of following formula (1) and (2) two kinds of structural units:
Wherein, R3And R4It is independently chosen from H or methyl；R' is selected from C8-C18F replace saturated fat base or aromatic radical, a R'
The atom number of middle H, b are the atom number of F in R', the ratio satisfaction 0≤a/ (a+b)≤0.8 of F and H；R " is selected from C10-C18's
Saturated fat base or aromatic radical.
2. oil base drilling fluid according to claim 1, it is characterised in that the base oil is selected from hydrocarbon or/and ester.
3. oil base drilling fluid according to claim 1, it is characterised in that the base oil is selected from mineral oil and/or diesel oil.
4. oil base drilling fluid according to claim 1, it is characterised in that the tackifier are oil-soluble producing high-molecular
Close object.
5. the preparation method of any oil base drilling fluid of Claims 1 to 4, comprising the following steps:
(1) by R1- OH and propylene oxide are added in reaction kettle, in the presence of propoxylated Catalyst, reaction temperature 30-
It 150 DEG C, reacts 2-20 hours, R is then added2- Cl, the reaction was continued 3-15 hours, obtains general formula through processing after reaction and is
R1-O-(C3H6O)z-R2Foaming agent；
(2) by monomer C2H2R3COOR' and C2H2R4COOR " is added in reaction kettle, to account in terms of the total quality of above two monomer,
The oil-soluble initiator of 0.1%-2% is added, reaction temperature is 50-120 DEG C, is reacted 3-12 hours, after reaction through handling
Obtain the foam stabilizer being made of the molecular structure unit；
(3) the component number is pressed, by obtained foam stabilizer in obtained foaming agent in base oil, step (1), step (2)
It is uniformly mixed, the oil base drilling fluid is made.
6. application of any oil base drilling fluid of Claims 1 to 4 in oil drilling, it is characterised in that the application
Being applicable in formation temperature is 80-200 DEG C.
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| CN114437683B (en) * | 2020-11-03 | 2023-08-11 | 中石化石油工程技术服务有限公司 | High-temperature-resistant oil-based foam drilling fluid and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2009202539B2 (en) * | 2008-07-02 | 2011-09-15 | Lubrizol Oilfield Solutions, Inc | Enhanced oil-based foam drilling fluid compositions and method for making and using same |
| CN102559157A (en) * | 2011-12-09 | 2012-07-11 | 中国石油大学(华东) | Environmentally-friendly high-temperature-resistant synthetic base foam drilling fluid and preparation method thereof |
| CN103421474A (en) * | 2012-05-16 | 2013-12-04 | 中国石油化工股份有限公司 | Low density oil base drilling fluid |
| CN103773333A (en) * | 2012-10-20 | 2014-05-07 | 中国石油化工股份有限公司 | High-temperature and oil-resistant foam drilling fluid, and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2009202539B2 (en) * | 2008-07-02 | 2011-09-15 | Lubrizol Oilfield Solutions, Inc | Enhanced oil-based foam drilling fluid compositions and method for making and using same |
| CN102559157A (en) * | 2011-12-09 | 2012-07-11 | 中国石油大学(华东) | Environmentally-friendly high-temperature-resistant synthetic base foam drilling fluid and preparation method thereof |
| CN103421474A (en) * | 2012-05-16 | 2013-12-04 | 中国石油化工股份有限公司 | Low density oil base drilling fluid |
| CN103773333A (en) * | 2012-10-20 | 2014-05-07 | 中国石油化工股份有限公司 | High-temperature and oil-resistant foam drilling fluid, and preparation method thereof |
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